A blizzard moves into Chicago, stranding a family in the snow. Pratt, Abby, Hope and Ray must struggle to save the family, and keep hope alive when they learn one member is still missing. Luka’s got a problem intern in his sights, and he’s not plea... (more)sed. Later, a gang shooting challenges Luka and Pratt. Meanwhile, Luka and Abby begin making wedding plans, but is their engagement still a secret? Sam makes a difficult choice about Alex, and wonders if she’s failed him. Neela discovers she’s no longer Dubenko’s favorite, and Gates has an unexpected, and unwelcome, visitor.

Aaron Todd Kessee, Angel Laketa Moore, Cocoa Brown, Deka Beaudine, Dominic Janes, George Gerdes, Hassan Iniko Johnson, John Barbolla, Johnny Palermo, Julia Ling, Margaret Travolta, Mati Moralejo, Sean Blakemore, Stacy Keach, Vyto Ruginis